I'd LOVE to have a half hour chat with John and Bonita. Admittedly I'd probably want to talk about John's role on "Cold Case" (BIG fan of that show) and Bonita's role on "Chuck" (I liked that she once compared her role in an interview to Vaughn Armstrong's as Forrest).
I ended up talking to Bonita about Chuck since i am a fan of that series as well. I asked them both what they liked best about their roles on Chuck/Enterprise and Bonita said she really enjoyed getting to give orders and boss people around :P
I was kinda lucky as the event was beginning to wind down so there was more chance to just hang out and chat with the guests for the last hour or two.